Carrie Rigdon, PhD, MPHDairy and Food Inspection Division

Rapid Response Team Project Planner

Recalls & Tracebacks

Dairy and Food Inspection Division

• Dairy farms, processors, transport vehicles

• Food processing, grocery stores

• Meat processing• Feed mills

Minnesota Departments of Health, Agriculture Laboratory/Program

Buildings

Foodborne Disease Detection Timeline

Farm TransportProcessingDistribution

Preparation Exposure Incubation Illness Death

Human disease surveillanceFood Monitoring Programs

Farm TransportProcessingDistribution

Preparation Exposure Incubation Illness Death

Foodborne Disease Detection Timeline

Human disease surveillance

• Pathogen-specific human disease surveillance

• Illness notification / complaint systems

• Syndromic surveillance

Surveillance Systems

• Food pathogen surveillance

• Animal disease surveillance

• Industry surveillance

• Consumer complaints

Food Monitoring Programs

Statutory Authority

Statutory Authority

Product Tracing

• Key Concepts– Trace-back is only as good as the

epidemiology– The more specific, the better the results– Oftentimes, solving an outbreak

requires good evidence from both the epi and the trace-back

Epidemiology meets Trace-back

Cluster of Cases that match by PFGE subtype

Common Exposure – Same Restaurant Chain – Varying locations

All Cases Consumed Sprout Containing Sandwiches

Different Suppliers for each Restaurant

Different Growers for each Supplier

Common Seed Source for each Grower

Common Farm for Seed Source

Epidemiology

“Epi” Trace-back

Recall – Stop On-going Exposure

Salmonella Saintpaul Patron Cases Associated with the Good Earth Restaurant by Date of

Isolate Receipt in MDH Laboratory, June 2008

JuneDate of Isolate Receipt

Nu

mb

er o

f C

ases

23 24 25 26 27 28 29 30 1 2 3 422

2

3

4

5

6

1

7 Two cases name Good Earth

Salmonella Saintpaul Patron Cases Associated with the Good Earth Restaurant by Date of

Isolate Receipt in MDH Laboratory, June 2008

JuneDate of Isolate Receipt

Nu

mb

er o

f C

ases

23 24 25 26 27 28 29 30 1 2 3 422

2

3

4

5

6

1

7 Second case names Good Earth

Visit restaurant

Initial case-control study/traceback results to CDC

Salmonella Saintpaul Investigation

• Illustrates:– Combination of rapid epidemiological

and traceback investigation– Identify source as jalapeño peppers– Trace peppers back to Texas– Joint communications with FDA and

CDC

Salmonella Typhimurium Investigation

• Illustrates:– Combination of rapid epidemiological,

traceback and laboratory identification– Identify source as peanut butter– MDA Lab finds Salmonella in King Nut– Joint communications with FDA and

CDC

1st 9 cases in MN

Institutional link,Implication of PB

FDA Investigation

Salmonella Outbreak:Products Tested

Will the food isolate

match the outbreak strain?

$64,000 Question

PFGE-XbaI

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Typhimurium

Typhimurium

Typhimurium

Typhimurium

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Human

Food

Food

Human

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Peanut Butter

Peanut Butter

Sample Results

• Salmonella Typhimurium– 5 lb container of King Nut Creamy Peanut Butter

• Genetic fingerprint matches nationwide outbreak

– 35 lb container of Parnell’s Pride Creamy Peanut Butter

• Salmonella Tennessee– 5 lb container of King Nut Creamy Peanut Butter– Returned from Nursing Home A

MDH Epi

MDA Food

Inspection

MDA Lab

MDH Lab

Questions?

• Please visit our website:– www.mda.state.mn.us– Click Food From Farm to Table

• Food Safety

• Carrie.Rigdon@state.mn.us– 651-201-6453